/*
* CodePress - Real Time Syntax Highlighting Editor written in JavaScript - http://codepress.org/
* Copyright (C) 2007 Fernando M.A.d.S. <fermads@gmail.com>
* Contributors :
* Michael Hurni <michael.hurni@gmail.com>
* This program is free software; you can redistribute it and/or modify it under the terms of the 
* GNU Lesser General Public License as published by the Free Software Foundation.
* 
* Read the full licence: http://www.opensource.org/licenses/lgpl-license.php
*/
CodePress = {
scrolling : false,
autocomplete : true,
// set initial vars and start sh
initialize : function() {
if(typeof(editor)=='undefined' && !arguments[0]) return;
chars = '|32|46|62|'; // charcodes that trigger syntax highlighting
cc = '\u2009'; // control char
editor = document.getElementsByTagName('pre')[0];
editor.contentEditable = 'true';
document.getElementsByTagName('body')[0].onfocus = function() {editor.focus();}
document.attachEvent('onkeydown', this.metaHandler);
document.attachEvent('onkeypress', this.keyHandler);
window.attachEvent('onscroll', function() { if(!CodePress.scrolling) setTimeout(function(){CodePress.syntaxHighlight('scroll')},1)});
completeChars = this.getCompleteChars();
//CodePress.syntaxHighlight('init');
setTimeout(function() { window.scroll(0,0) },50); // scroll IE to top
},
// treat key bindings
keyHandler : function(evt) {
charCode = evt.keyCode;
if(completeChars.indexOf('|'+String.fromCharCode(charCode)+'|')!=-1 && CodePress.autocomplete) { // auto complete
CodePress.complete(String.fromCharCode(charCode))
}
else if(chars.indexOf('|'+charCode+'|')!=-1||charCode==13) { // syntax highlighting
CodePress.syntaxHighlight('generic');
}
},
metaHandler : function(evt) {
keyCode = evt.keyCode;
if(keyCode==9 || evt.tabKey) { 
CodePress.snippets();
}
else if((keyCode==122||keyCode==121||keyCode==90) && evt.ctrlKey) { // undo and redo
(keyCode==121||evt.shiftKey) ? CodePress.actions.redo() :  CodePress.actions.undo(); 
evt.returnValue = false;
}
else if(keyCode==34||keyCode==33) { // handle page up/down for IE
self.scrollBy(0, (keyCode==34) ? 200 : -200); 
evt.returnValue = false;
}
else if(keyCode==46||keyCode==8) { // save to history when delete or backspace pressed
CodePress.actions.history[CodePress.actions.next()] = editor.innerHTML;
}
else if((evt.ctrlKey || evt.metaKey) && evt.shiftKey && keyCode!=90)  { // shortcuts = ctrl||appleKey+shift+key!=z(undo) 
CodePress.shortcuts(keyCode);
evt.returnValue = false;
}
else if(keyCode==86 && evt.ctrlKey)  { // handle paste
window.clipboardData.setData('Text',window.clipboardData.getData('Text').replace(/\t/g,'\u2008'));
top.setTimeout(function(){CodePress.syntaxHighlight('paste');},10);
}
else if(keyCode==67 && evt.ctrlKey)  { // handle cut
// window.clipboardData.setData('Text',x[0]);
// code = window.clipboardData.getData('Text');
}
},
// put cursor back to its original position after every parsing
findString : function() {
range = self.document.body.createTextRange();
if(range.findText(cc)){
range.select();
range.text = '';
}
},
// split big files, highlighting parts of it
split : function(code,flag) {
if(flag=='scroll') {
this.scrolling = true;
return code;
}
else {
this.scrolling = false;
mid = code.indexOf(cc);
if(mid-2000<0) {ini=0;end=4000;}
else if(mid+2000>code.length) {ini=code.length-4000;end=code.length;}
else {ini=mid-2000;end=mid+2000;}
code = code.substring(ini,end);
return code.substring(code.indexOf('<P>'),code.lastIndexOf('</P>')+4);
}
},
// syntax highlighting parser
syntaxHighlight : function(flag) {
if(flag!='init') document.selection.createRange().text = cc;
o = editor.innerHTML;
if(flag=='paste') { // fix pasted text
o = o.replace(/<BR>/g,'\r\n'); 
o = o.replace(/\u2008/g,'\t');
}
o = o.replace(/<P>/g,'\n');
o = o.replace(/<\/P>/g,'\r');
o = o.replace(/<.*?>/g,'');
o = o.replace(/&nbsp;/g,'');
o = '<PRE><P>'+o+'</P></PRE>';
o = o.replace(/\n\r/g,'<P></P>');
o = o.replace(/\n/g,'<P>');
o = o.replace(/\r/g,'<\/P>');
o = o.replace(/<P>(<P>)+/,'<P>');
o = o.replace(/<\/P>(<\/P>)+/,'</P>');
o = o.replace(/<P><\/P>/g,'<P><BR/></P>');
x = z = this.split(o,flag);
if(arguments[1]&&arguments[2]) x = x.replace(arguments[1],arguments[2]);
for(i=0;i<Language.syntax.length;i++) 
x = x.replace(Language.syntax[i].input,Language.syntax[i].output);
editor.innerHTML = this.actions.history[this.actions.next()] = (flag=='scroll') ? x : o.replace(z,x);
if(flag!='init') this.findString();
},
snippets : function(evt) {
var snippets = Language.snippets;
var trigger = this.getLastWord();
for (var i=0; i<snippets.length; i++) {
if(snippets[i].input == trigger) {
var content = snippets[i].output.replace(/</g,'&lt;');
content = content.replace(/>/g,'&gt;');
if(content.indexOf('$0')<0) content += cc;
else content = content.replace(/\$0/,cc);
content = content.replace(/\n/g,'</P><P>');
var pattern = new RegExp(trigger+cc,"gi");
this.syntaxHighlight('snippets',pattern,content);
}
}
},
readOnly : function() {
editor.contentEditable = (arguments[0]) ? 'false' : 'true';
},
complete : function(trigger) {
var complete = Language.complete;
for (var i=0; i<complete.length; i++) {
if(complete[i].input == trigger) {
var pattern = new RegExp('\\'+trigger+cc);
var content = complete[i].output.replace(/\$0/g,cc);
setTimeout(function () { CodePress.syntaxHighlight('complete',pattern,content)},0); // wait for char to appear on screen
}
}
},
getCompleteChars : function() {
var cChars = '';
for(var i=0;i<Language.complete.length;i++)
cChars += '|'+Language.complete[i].input;
return cChars+'|';
},
shortcuts : function() {
var cCode = arguments[0];
if(cCode==13) cCode = '[enter]';
else if(cCode==32) cCode = '[space]';
else cCode = '['+String.fromCharCode(keyCode).toLowerCase()+']';
for(var i=0;i<Language.shortcuts.length;i++)
if(Language.shortcuts[i].input == cCode)
this.insertCode(Language.shortcuts[i].output,false);
},
getLastWord : function() {
var rangeAndCaret = CodePress.getRangeAndCaret();
words = rangeAndCaret[0].substring(rangeAndCaret[1]-40,rangeAndCaret[1]);
words = words.replace(/[\s\n\r\);\W]/g,'\n').split('\n');
return words[words.length-1].replace(/[\W]/gi,'').toLowerCase();
}, 
getRangeAndCaret : function() {
var range = document.selection.createRange();
var caret = Math.abs(range.moveStart('character', -1000000)+1);
range = this.getCode();
range = range.replace(/\n\r/gi,'  ');
range = range.replace(/\n/gi,'');
return [range.toString(),caret];
},
insertCode : function(code,replaceCursorBefore) {
var repdeb = '';
var repfin = '';
if(replaceCursorBefore) { repfin = code; }
else { repdeb = code; }
if(typeof document.selection != 'undefined') {
var range = document.selection.createRange();
range.text = repdeb + repfin;
range = document.selection.createRange();
range.move('character', -repfin.length);
range.select();
}
},
// get code from editor
getCode : function() {
var code = editor.innerHTML;
code = code.replace(/<br>/g,'\n');
code = code.replace(/<\/p>/gi,'\r');
code = code.replace(/<p>/i,''); // IE first line fix
code = code.replace(/<p>/gi,'\n');
code = code.replace(/&nbsp;/gi,'');
code = code.replace(/\u2009/g,'');
code = code.replace(/<.*?>/g,'');
code = code.replace(/&lt;/g,'<');
code = code.replace(/&gt;/g,'>');
code = code.replace(/&amp;/gi,'&');
return code;
},
// put code inside editor
setCode : function() {
var code = arguments[0];
code = code.replace(/\u2009/gi,'');
code = code.replace(/&/gi,'&amp;');
code = code.replace(/</g,'&lt;');
code = code.replace(/>/g,'&gt;');
editor.innerHTML = '<pre>'+code+'</pre>';
},
// undo and redo methods
actions : {
pos : -1, // actual history position
history : [], // history vector
undo : function() {
if(editor.innerHTML.indexOf(cc)==-1){
document.selection.createRange().text = cc;
this.history[this.pos] = editor.innerHTML;
}
this.pos--;
if(typeof(this.history[this.pos])=='undefined') this.pos++;
editor.innerHTML = this.history[this.pos];
CodePress.findString();
},
redo : function() {
this.pos++;
if(typeof(this.history[this.pos])=='undefined') this.pos--;
editor.innerHTML = this.history[this.pos];
CodePress.findString();
},
next : function() { // get next vector position and clean old ones
if(this.pos>20) this.history[this.pos-21] = undefined;
return ++this.pos;
}
}
}
Language={};
window.attachEvent('onload', function() { CodePress.initialize('new');});